2 citations · 5 across the 6 of their papers we have counts for
6 papers
On the Dominions of Certain Semigroups of Transformations
Halima H. Assiri, Jehan A. Albar
In the full transformation semigroup on a finite chain , let be the subsemigroup of all order-decreasing maps of ,…
A normal quotient analysis for some families of oriented four-valent graphs
Jehan A. Al-bar, Ahmad N. Al-kenani, Najat Mohammad Muthana +1
We analyse the normal quotient structure of several infinite families of finite connected edge-transitive, four-valent oriented graphs. These families were singled out by Marusic a…
Finite edge-transitive oriented graphs of valency four with cyclic normal quotients
Jehan A. Al-bar, Ahmad N. Al-kenani, Najat Mohammad Muthana +1
We study finite four-valent graphs Gamma admitting an edge-transitive group G of automorphisms such that G determines and preserves an edge-orientation on Gamma, and such that at l…
Finite edge-transitive oriented graphs of valency four: a global approach
Jehan A. Al-bar, Ahmad N. Al-kenani, Najat Mohammad Muthana +2
We develop a new framework for analysing finite connected, oriented graphs of valency 4, which admit a vertex-transitive and edge-transitive group of automorphisms preserving the e…
Quasi-ideal transversals of abundant semigroups and spined products
Jehan Al-Bar, James Renshaw
We provide a new and much simpler structure for quasi-ideal adequate transversals of abundant semigroups in terms of spined products, which is similar in nature to that given by Sa…
Adequate transversals of quasi-adequate semigroups
Jehan Al-Bar, James Renshaw
The concept of an adequate transversal of an abundant semigroup was introduced by El-Qallali in [8] whilst in [7], he and Fountain initiated the study of quasi-adequate semigroups…